This is just my initial impression, as I just made a purchase last night. I paid with PayPal and received the receipt. Later I received an automatic email from the seller and it had a Pay Now link.(If I click there, PayPal tells me I have already paid.
I email the seller from the automatic email and have gotten no response from three emails. I know this is early but I had etsy purchases the same night and received immediate order received and paid for and even shipment info.
Ecrater is for sellers and from what I've heard in other review sites, they aren't supported by ecrater. You cannot contact them as a seller or buyer and get a response. There is no security that the transaction will take place and nowhere on the site to search for the seller.
Luckily, I've read PayPal has rescued many a bad transaction or non-shipment. I hope I get lucky and get a response from my seller and receive my product. I will not give this a try again. You have to be lucky and pick a legit seller who is on the ball.